I recently had a problem with our well. We have a deep well (over 400'), we woke up one morning with no water. I changed out the pressure switch but didn't fix the problem. I then pulled all of the water pipe (black roll 1") up out of the casing and found that there were a few wires that were worn in to due to the pump cycling on and off. I repaired the wiring and re-inserted the pump into the well. Turned everything back on and purged the lines and now we have very little water pressure. By the way, I threw away the old pressure switch (not knowing that it was probably still okay). Any ideas?